The Three Pie Charts below show the changes in annual spending by a particular UK school in 1981, 1991, and 2001. Summarise the information by selecting and reporting the main features, and make comparison where relevant.

The pie charts depict the differences in annual expenditures of a school in the

year

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years

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1981, 1991 and 2001.

Overall

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, it is evident that the teachers'

salaries

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accounted for the highest proportion of annual spending in all three years,

whereas

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insurance accounted for the least.

Teachers

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Teachers'

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salaries

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constituted the largest share of the total expenditure throughout the years. The percentage ranged from 40% to 50 %.

On the contrary

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, the total spending on insurance was lower than all other categories, around 2 % in 1981, 3% in 1991,which

then

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rose to 8% in 2001. Followed by

teachers

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teachers'

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salaries

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, other staff

salaries

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had the second highest group.

This

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category accounted for 28% of the total share in 1981, 22% in 1991

but

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, but

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then

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saw a decline by 7% in 2001. A similar drop in shares was experienced by

resources

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the resources

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and books group, which comprised15% and 20% of the total proportion in 1981 and

1991

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1991,

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respectively. These figures dropped to 9% in 2001. Meanwhile, the shares for furniture and equipment fluctuated throughout the period

starting

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, starting

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from 15 % in 1981 to 5% in 1991,

then

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rising to 23 % in 2001.